package com.uziot.bucket.security.config;

import com.uziot.bucket.security.config.filter.AuthenticationTokenFilter;
import com.uziot.bucket.security.config.handler.AuthenticationEntryPointImpl;
import com.uziot.bucket.security.config.handler.LogoutSuccessHandlerImpl;
import com.uziot.bucket.security.config.handler.UserAccessDeniedHandlerImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.firewall.DefaultHttpFirewall;
import org.springframework.security.web.firewall.HttpFirewall;

import javax.annotation.Resource;

/**
 * @author shidt
 * @version V1.0
 * @className SecurityConfig
 * @date 2020-11-16 23:48:56
 * @description spring security配置
 */

@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    /**
     * 自定义用户认证逻辑
     */
    @Resource
    private UserDetailsService userDetailsServiceImpl;
    /**
     * 认证失败处理类
     */
    @Autowired
    private AuthenticationEntryPointImpl authenticationEntryPointImpl;
    /**
     * 退出处理类
     */
    @Autowired
    private LogoutSuccessHandlerImpl logoutSuccessHandlerImpl;
    /**
     * token认证过滤器
     */
    @Autowired
    private AuthenticationTokenFilter authenticationTokenFilter;
    /**
     * 权限校验失败处理类
     */
    @Autowired
    private UserAccessDeniedHandlerImpl userAccessDeniedHandlerImpl;

    /**
     * 解决 无法直接注入 AuthenticationManager
     *
     * @return AuthenticationManager
     * @throws Exception Exception
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    /**
     * 身份认证接口调用注入
     */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsServiceImpl).passwordEncoder(bCryptPasswordEncoder());
    }

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                // CRSF禁用，因为不使用session
                .csrf().disable()
                // 认证失败处理类
                .exceptionHandling()
                // 认证失败处理机制
                .authenticationEntryPoint(authenticationEntryPointImpl)
                // 鉴权失败处理机制
                .accessDeniedHandler(userAccessDeniedHandlerImpl)
                // 基于token，所以不需要session
                .and().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                // 过滤请求
                .and().authorizeRequests()
                // 对于登录login 验证码captchaImage 允许匿名访问
                .antMatchers("/login", "/captchaImage").anonymous()
                .antMatchers(
                        HttpMethod.GET,
                        "/*.html",
                        "/**/*.html",
                        "/**/*.css",
                        "/**/*.js").permitAll()
                .antMatchers("/profile/**").anonymous()
                .antMatchers("/common/download**").anonymous()
                .antMatchers("/common/download/resource**").anonymous()
                .antMatchers("/swagger-ui.html").anonymous()
                .antMatchers("/swagger-resources/**").anonymous()
                .antMatchers("/webjars/**").anonymous()
                .antMatchers("/*/api-docs").anonymous()
                .antMatchers("/druid/**").anonymous()
                .antMatchers("/static/**").anonymous()
                .antMatchers("/favicon.ico").anonymous()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated()
                .and()
                .headers().frameOptions().disable();
        // 挂载退出接口钩子，退出时处理
        httpSecurity.logout().logoutUrl("/logout").logoutSuccessHandler(logoutSuccessHandlerImpl);
        // 添加JWT filter
        httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
    }


    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }


    /**
     * HttpFirewall 作用是解决url中带// 时，被SpringSecurity认为市是不正常的请求地址
     * 有时候会用到，当然一般的//确实是不正常的
     *
     * @return Firewall
     */
    @Bean
    public HttpFirewall defaultHttpFirewall() {
        return new DefaultHttpFirewall();
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.httpFirewall(defaultHttpFirewall());
        super.configure(web);
    }

}
